Controlled Dielectric
Controlled Dielectric is a PCB design technique involving selecting materials with controlled dielectric constants (Dk) for each layer of the stack-up. The PCB designer specifies the target Dk value, dielectric loss tangent (Df) (if critical), product name (material designation), and thickness for each layer material. The designer performs the impedance and trace width calculations. The CM follows the designer's specifications. They source laminates with the requested properties and ensure they work with their fabrication processes. This design technique is for PCB designs where precise Dk control is key. It is often used as a foundation for controlled impedance design.
Categories: PCBA Manufacturing